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st: RE: check for double id-numbers


From   "Maarten Buis" <M.Buis@fsw.vu.nl>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: check for double id-numbers
Date   Thu, 24 Nov 2005 12:39:16 +0100

-help isid-

-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology 
Vrije Universiteit Amsterdam 
Boelelaan 1081 
1081 HV Amsterdam 
The Netherlands

visiting adress:
Buitenveldertselaan 3 (Metropolitan), room Z214 

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of Raoul C Reulen
Sent: donderdag 24 november 2005 12:36
To: statalist@hsphsun2.harvard.edu
Subject: st: check for double id-numbers

Hi,

I have a data file and I want to know whether there are id-numbers that are used twice in the dataset? How can I run a check on this? Thanks.

Raoul

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